PLVMB with a "C" prefix?

[M-EGT]

Unless I'm missing something, I can find any info regarding the C prefix on the item number. Picture for clarity

what the info on these? Thanks!

 

[Oldtuleguy]

Is that a connecting rod bolt socket?

 

[M-EGT]

Is that a connecting rod bolt socket?

Just s regular 7/16 socket

 

[r_olson_06]

Unless I'm missing something, I can find any info regarding the C prefix on the item number. Picture for clarity

what the info on these? Thanks!

I have a few 1/2" and 3/4" drive C stamps. I bet they are contract production for someone. The 3/4" drive is a WF style.

Looking for a Round Beam Plomb 1068 Double Box End Wrench